Abstract
The 137I nucleus, populated in the spontaneous fission of 248Cm
has been studied by means of prompt -ray spectroscopy using the EUROGAM2 array.
Medium-spin yrast excitations in 137I were observed for the first time.
The experimental level scheme is compared to the shell
model calculation with modified Kuo-Herling interaction.
The theoretical predictions differ significantly from the experimental
results, indicating that the excitation pattern in 137I
deviates significantly from the shell model scheme.